scholarly journals Highly stretchable metal-polymer hybrid conductors for wearable and self-cleaning sensors

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Sunyoung Yoon ◽  
Yong Jun Kim ◽  
Yu Rim Lee ◽  
Nae-Eung Lee ◽  
Yoochan Won ◽  
...  
Keyword(s):  
Sheet Resistance ◽  
High Performance ◽  
Hydrophobic Surface ◽  
Ptfe Film ◽  
Polymer Hybrid ◽  
Stretchable Conductors ◽  
Bending Radius ◽  
Highly Stretchable ◽  
Self Cleaning ◽  
Touch Panels

AbstractWe fabricated semitransparent and stretchable hybrid Ag-polytetrafluoroethylene (PTFE) conductors on a polyurethane (PU) substrate for use in high-performance wearable and self-cleaning sensors. The highly conductive Ag metal and stretchable PTFE polymer matrix were cosputtered, embedding the self-formed Ag in the PTFE matrix. Depending on the cosputtering RF and DC power ratio, the Ag-PTFE conductors showed a sheet resistance of 3.09–17.23 Ω/square and an optical transparency of 25.27–38.49% at a wavelength of 550 nm. Under the optimal cosputtering conditions, the Ag-PTFE electrode showed outstanding stretchability (strain 20%) and reversible hysteresis, enabling the production of stretchable and semitransparent conductors. In addition, the very small critical inward/outward bending radius near 1 mm and the hydrophobic surface indicate that the Ag-PTFE films could also be applied in wearable and self-cleaning devices. The suitability of the high stretchability and low sheet resistance of the sputtered Ag-PTFE conductor was verified by using it as a stretchable interconnector for commercial ELs, LEDs, and strain sensors. We applied the Ag-PTFE film as a semitransparent conductor for stretchable touch panels and electromyography sensors. Cosputtered Ag-PTFE films are promising stretchable conductors for a variety of applications in next-generation wearable devices.

scholarly journals Experimental measurement and Numerical Simulation of Particle Deposition on super–hydrophobic surface

2019 ◽  
Vol 128 ◽  
pp. 06009
Author(s):  
Anjian Pan ◽  
Lizhi Zhang ◽  
Hao Lu
Keyword(s):  
Numerical Simulation ◽  
Surface Energy ◽  
Experimental Measurement ◽  
High Performance ◽  
Particle Deposition ◽  
Hydrophobic Surface ◽  
Dust Deposition ◽  
Energy Devices ◽  
Hydrophobic Coating ◽  
Self Cleaning

Airborne dust deposition on a large number of energy devices would cause serious efficiency and lifetime reduction, such as solar photovoltaic panels, heat exchanger surfaces and fan blades. Mechanicalor manual cleaning using water is still the main method of mitigating dust deposition damage on theserelated energy equipment, which is commonly expensive and frequent. As a kind of self-cleaningmaterial,super–hydrophobic coating may become a new effective way to mitigating the dust deposition issue. Super–hydrophobic coatings with low surface energy and unique micro-nano secondary structure can significantly reduce dust deposition rate. However, mechanism of dust deposition on super-hydrophobic surfaces remains unclear. Thus it is difficult to develop high performance self-cleaning coating. This paper aims to investigate dust deposition behaviors and mechanisms on super-hydrophobic surface by experimental measurement and numerical simulation. Lattice Boltzmann Method-Discrete Particle Method (LBM–DPM) will be developed to predict dust particle deposition process including settling, collision adhesion and rebound behaviors. The mechanisms and interactions between coating surface energy, particle characteristics, particle incident velocity and particle adhesion or rebound behavior will be studied carefully. The findings and results may be useful to guide the development of high performance self-cleaning super– hydrophobic coating.

Facile preparation of multi-scale nanoarchitectures on cotton fabric with low surface energy for high performance self-cleaning

2020 ◽  
Vol 111 (11) ◽  
pp. 1603-1613
Author(s):  
Shengnan Tian ◽  
Jian Zhao ◽  
Jiahuan He ◽  
Haiting Shi ◽  
Bingqi Jin ◽  
...  
Keyword(s):  
Surface Energy ◽  
Cotton Fabric ◽  
High Performance ◽  
Multi Scale ◽  
Low Surface Energy ◽  
Facile Preparation ◽  
Self Cleaning

scholarly journals Highly Stretchable Conductors Based on Expanded Graphite Macroconfined in Tubular Rubber

2017 ◽  
Vol 9 (49) ◽  
pp. 43239-43249 ◽  
Author(s):  
Wei Luo ◽  
Tongfei Wu ◽  
Biqiong Chen ◽  
Mei Liang ◽  
Huawei Zou
Keyword(s):  
Expanded Graphite ◽  
Stretchable Conductors ◽  
Highly Stretchable

Simulation Analysis of Springback for Lead Frame Copper Alloy

2012 ◽  
Vol 560-561 ◽  
pp. 1048-1051 ◽  
Author(s):  
Juan Hua Su ◽  
Feng Zhang Ren ◽  
Ze Yang
Keyword(s):  
Integrated Circuit ◽  
Copper Alloy ◽  
High Performance ◽  
Simulation Analysis ◽  
Copper Alloys ◽  
Lead Frame ◽  
Bending Performance ◽  
Curvature Variation ◽  
Modeling Software ◽  
Bending Radius

The bending performance of lead frame materials is a very important in improving the quality of lead frame alloys and meeting the needs of high performance integrated circuit. The sringback amount of curvature variation of CuFeP , CuCrZrMg , CuNiSi and CuCrSnZn alloy are researched by numerical simulation. Bending model is built by 3D modeling software, and the necessary post-processing is carried out. The bending springback amount △K of the four kinds of copper alloy materials are calculated out. The results show that the sringback amount of curvature variation of four copper alloys at the same condition from large to small in turn is CuCrZrMg, CuNiSi, CuFeP, CuCrSnZn. Smaller the minimum relatively bending radius of copper alloy used in lead frame, less the springback amount and better the forming performance.

scholarly journals A mechanically and electrically self-healing graphite composite dough for stencil-printable stretchable conductors

2016 ◽  
Vol 4 (19) ◽  
pp. 4150-4154 ◽  
Author(s):  
Tongfei Wu ◽  
Biqiong Chen
Keyword(s):  
Self Healing ◽  
Ambient Conditions ◽  
Graphite Composite ◽  
Stretchable Conductors ◽  
Highly Stretchable ◽  
Stretchable Conductor

A graphite composite dough exhibited rapid mechanically and electrically self-healing properties under ambient conditions and showed potential for highly stretchable conductor applications.

scholarly journals Hydrophobic zinc-tellurite glass system as self-cleaning vehicle: Interplay amid SiO2 and TeO2

2018 ◽  
Vol 14 ◽  
pp. 492-494
Author(s):  
Siti Nur Nazhirah Mazlan ◽  
Ramli Arifin ◽  
Sib Krishna Ghoshal
Keyword(s):  
Contact Angle ◽  
Hydrophobic Interactions ◽  
Hydrophobic Surface ◽  
Cost Effective ◽  
Underlying Mechanism ◽  
Industrial Applications ◽  
Glass System ◽  
Preparation Technique ◽  
Water Contact ◽  
Self Cleaning

Cost-effective, environmental amiable and maintenance free glasses with improved hydrophobic activity are needed for diverse industrial applications. Pollutant and dirt depositions on glasses that cause the visual obscurity and damages of the cultural heritages require inhibition. The underlying mechanism of hydrophobic interactions assisted self-cleaning traits of glass is poorly understood. It has been shown that excellent hydrophobic glass with water contact angle (WCA) above 90o and very low surface wettability can be achieved by controlling the surface roughness (SR), where liquid droplets remain perfectly spherical on such surfaces (literally without touching) before being self-cleaned (rolls off). Moreover, selection and optimization of constituent materials composition as well as the preparation technique play a significant role towards such success. Most of the previous attempts for the self-cleaning glass preparation were made via coating strategy on glass surface. Yet, preparation of super-hydrophobic glass surfaces with self-cleaning attributes remains an open challenge. Driven by this idea, we prepared a new glass system of composition (80 x) TeO2-20ZnO-(x)SiO2 (x = 0, 0.03, 0.06, 0.09 and 0.12 mol%) by melt-quenching method, where the proportions of SiO2 and TeO2 were interplayed. As-prepared samples (thin pellet without coating) were characterized using atomic force microscopy (AFM) and video contact angle (VCA) measurements. The effects of SiO2 concentration on the glass SR, surface energy and hydrophobic properties were evaluated. Glass 0.06 mol% of SiO2 revealed the optimal WCA of 112.39º and SR of 7.806 nm. It was established that a trade-off between SiO2 and TeO2 contents in the studied glasses could produce super-hydrophobic surface (WCA over 90º), leading to great opportunities for diverse self-cleaning applications.

Sign in / Sign up

Export Citation Format

Share Document